The Milwaukee M18 Redlithium High Output Xc5 Resistant Battery Pack provides 50 percent more power vs. Redlithium Xc5.0, delivering a Pwr level 3 on the M18 Redlithium Power scale and 5 amp hours of runtime. This battery delivers a balance of power, runtime and size that is fully compatible with 300+ M18 solutions. The M18 Redlithium High Output Xc5 Resistant battery has an upgraded fuel gauge and button to provide an improved feel and ease of access so you can verify charge quickly and confidently on the job. Built-in Redlink Intelligence protects the battery from overload protection using total system communication between tool, battery, and charger while optimizing and enhancing your tool's performance. Redesigned pack construction, with increased durability, delivers long-lasting performance and protection on the jobsite, this protection routes water away from the electronics and out of the battery pack, extends your battery's runtime and life by minimizing heat, and prevents battery failures from vibration or drops. Upgrade to the M18 Redlithium High Output Xc5 Resistant Battery to instantly upgrade power for your Milwaukee M18 cordless tools.